Table of Contents
November 2013

Find out all you need to know about this year's most anticipated cosmic event, Comet ISON. Whether it flares or fizzles, this is one show you won't want to miss.

Read about the therapy that helps patients overcome OCD and how politics are putting pachyderms in peril. Also in this issue: the science of sex ratios in future generations, the real trick to successful negotiations, and the disease that makes people allergic to the most common chemicals in everyday life.